package/wlroots: add license file information

Signed-off-by: Gilles Talis <gilles.talis@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/wlroots/wlroots.mk

@@ -7,6 +7,7 @@
 WLROOTS_VERSION = 0.10.1
 WLROOTS_SITE = https://github.com/swaywm/wlroots/releases/download/$(WLROOTS_VERSION)
 WLROOTS_LICENSE = MIT
+WLROOTS_LICENSE_FILES = LICENSE
 WLROOTS_INSTALL_STAGING = YES
 
 WLROOTS_DEPENDENCIES = \